Blockman BlockmanCodes

I make blockchain coding videos on YouTube

BlockmanCodes / 08_decodeExactInputPath.js

Last active March 20, 2024 06:44

Uniswap V3: decode exactInput paths

	const hashes = [
	'0x04fffe0fb9d0ac806b0f3c329a83d8dd5ddcd598ee82779043d83802d6ee784a',
	'0x8df99a1c9bbbf7cda5a9f1bc11d3b3cd0c6d99f31039396a29779fea252960f6',
	'0x3f94bc2af1300a01827e59a745b05af8517ae4fc5e25ee1add9789d19c9bfd00',
	'0x68cf26f581d6c0add08c9fcf9b1d4d31cff660d8bfb6b7d9e3636a7aa1e0a91f',
	'0xed797fb4d05950dca9279c55f2436211a3eb585f1f20877e7384017500951fe4',
	'0x7596c887baea532f2a2370af06d1990dac8be04f68e8f906dd82025d2ce42ad7',
	'0x8892ffda5398dbf54d0fb6bc4d2bbdbc31de250f633cf1becc568a92fbe63c51',
	'0x9219aa3bc64b325f84f9e3c101e602c83f65f61272a982c8f2fd1c55874ecc6d',
	'0x81995eb1d1a62c3dbdb817663e39b40d235861e4ee6513962299d8a15905dded',

BlockmanCodes / .env

Created August 31, 2023 22:30

Uniswap V3 / EthersJS: decode mempool swap router swaps

WEBSOCKET_URL=wss://mainnet.infura.io/ws/v3/abc

BlockmanCodes / 04_getLogsAndDecode.js

Created August 21, 2023 23:13

EthersJS: query, filter, and decode event logs

	require('dotenv').config()
	const ethers = require("ethers")

	// ie: -> Flash(address,address,uint256,uint256,uint256,uint256)
	const getEventSignature = (eventName, abi) => {
	const eventAbi = abi.find((entry) => entry.name === eventName);
	const types = eventAbi.inputs.map((input) => input.type);
	return `${eventName}(${types.join(',')})`;
	}

BlockmanCodes / 01_impersonateSigner.js

Created August 11, 2023 01:31

Hardhat: impersonate signer when forking

	const SwapRouterArtifact = require('@uniswap/v3-periphery/artifacts/contracts/SwapRouter.sol/SwapRouter.json')

	const erc20Abi = [
	{
	"inputs": [
	{"internalType": "address", "name": "spender", "type": "address"},
	{"internalType": "uint256", "name": "amount", "type": "uint256"}
	],
	"name": "approve",
	"outputs": [{"internalType": "bool", "name": "", "type": "bool"}],

BlockmanCodes / 01_simpleSwap.js

Created July 23, 2023 20:04

Uniswap: Universal Router: ETH to USDC

	const { SwapRouter } = require('@uniswap/universal-router-sdk')
	const { TradeType, Ether, Token, CurrencyAmount, Percent } = require('@uniswap/sdk-core')
	const { Trade: V2Trade } = require('@uniswap/v2-sdk')
	const { Pool, nearestUsableTick, TickMath, TICK_SPACINGS, FeeAmount, Trade: V3Trade, Route: RouteV3 } = require('@uniswap/v3-sdk')
	const { MixedRouteTrade, Trade: RouterTrade } = require('@uniswap/router-sdk')
	const IUniswapV3Pool = require('@uniswap/v3-core/artifacts/contracts/UniswapV3Pool.sol/UniswapV3Pool.json')
	const JSBI = require('jsbi')
	const erc20Abi = require('../abis/erc20.json')

BlockmanCodes / listen.js

Created July 13, 2023 01:44

Uniswap V3: listen all pools

	const ethers = require('ethers')

	const poolAbi = [
	{
	"anonymous": false,
	"inputs": [
	{"indexed": true, "internalType": "address", "name": "sender", "type": "address"},
	{"indexed": true, "internalType": "address", "name": "recipient", "type": "address"},
	{"indexed": false, "internalType": "int256", "name": "amount0", "type": "int256"},
	{"indexed": false, "internalType": "int256", "name": "amount1", "type": "int256"},

BlockmanCodes / abis__erc20.json

Last active August 23, 2023 21:53

Pancake Swap: exactInputSingle

	[
	{
	"inputs": [],
	"stateMutability": "nonpayable",
	"type": "constructor"
	},
	{
	"anonymous": false,
	"inputs": [
	{

BlockmanCodes / getPrice.js

Created June 16, 2023 12:25

Uni V3: getPriceFromTick

	const JSBI = require('jsbi')
	const { TickMath, FullMath } = require('@uniswap/v3-sdk')

	const baseToken = '0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599' // WETH
	const quoteToken = '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2' // WBTC

	async function main(
	baseToken,
	quoteToken,
	inputAmount,

BlockmanCodes / 01_classicSwap.js

Last active April 9, 2024 18:04

Kyber (classic): swap eth to usdt

	const ethers = require('ethers');


	const dmmRouterAbi = require("../abis/dmmRouter.json")
	const erc20Abi = require("../abis/erc20.json")
	const wethAbi = require("../abis/weth.json")


	WETH_ADDRESS= '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2'
	USDT_ADDRESS= '0xdAC17F958D2ee523a2206206994597C13D831ec7'

BlockmanCodes / 00_findPools.js

Created June 7, 2023 12:32

Kyber: get dmm pool addresses

	const ethers = require('ethers');

	const dmmFactoryAbi = require("../abis/dmmFactory.json")

	WETH_ADDRESS= '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2'
	USDT_ADDRESS= '0xdAC17F958D2ee523a2206206994597C13D831ec7'
	DMM_FACTORY_ADDRESS='0x833e4083B7ae46CeA85695c4f7ed25CDAd8886dE'

	const provider = new ethers.providers.JsonRpcProvider('http://127.0.0.1:8545/')